Is there way to apply scale on guitext?

Hi guys, first I want to apologize for my bad english, I come from Slovakia

My question is:

I started to develop games for android, but my problem is, that when I give my app into mobile with medium resolution ( 1280x720) it looks pretty good, but when I give it into devices with FULL HD resolution my GUIText is too small, nobody can read that. So I want auto scale for this text but when I was searching it on the internet I only found with OnGUI() but I dont create new main menu and text which are there, so is there way to apply auto scale for GUIText which are already exist?

Try this alternative, Works for both Lanscape and Potrait mode

function Start()
{

var myText = GetComponent(GUIText);

// 50 is the fontsize you want to use
myText.fontSize = Mathf.Min(screen.height,screen.width)/50;

}